Predicting molybdenum toxicity to higher plants: influence of soil properties

A - Papers appearing in refereed journals

McGrath, S. P., Mico, C., Curdy, R. and Zhao, F-J. 2010. Predicting molybdenum toxicity to higher plants: influence of soil properties. Environmental Pollution. 158 (10), pp. 3095-3102.

AuthorsMcGrath, S. P., Mico, C., Curdy, R. and Zhao, F-J.
Abstract

The effect of soil properties on the toxicity of molybdenum (Mo) to four plant species was investigated. Soil organic carbon or ammonium-oxalate extractable Fe oxides were found to be the best predictors of the 50% effective dose (ED50) of Mo in different soils, explaining > 65% of the variance in ED50 for four species except for ryegrass (26–38%). Molybdenum concentrations in soil solution and consequently plant uptake were increased when soil pH was artificially raised because sorption of Mo to amorphous oxides is greatly reduced at high pH. The addition of sulphate significantly decreased Mo uptake by oilseed rape. For risk assessment, we suggest that Mo toxicity values for plants should be normalised using soil amorphous iron oxide concentrations.

Year of Publication2010
JournalEnvironmental Pollution
Journal citation158 (10), pp. 3095-3102
Digital Object Identifier (DOI)doi:10.1016/j.envpol.2010.06.027
Open accessPublished as non-open access
Funder project or codeSEF
Toxicity and bioavailability of molybdenum in terrestrial environments
Output statusPublished
Publication dates
Online24 Jul 2010
Publication process dates
Accepted19 Jun 2010
ISSN0269-7491
PublisherElsevier Sci Ltd

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